DEV Community: Simanta Das

What If You Could Learn Python Entirely on Your Phone, Offline, for Free, and Get a Certificate at the End?

Simanta Das — Sat, 13 Jun 2026 10:56:56 +0000

What If You Could Learn Python Entirely on Your Phone, Offline, for Free — and Get a Certificate at the End?

Not hypothetically. Right now.

Most people who want to learn Python don't fail because they're not smart enough. They fail because good resources cost money, free ones are half-finished, and life doesn't always give you a quiet desk and stable internet.

No laptop. No Wi-Fi. No credit card. Just your phone and the time you already have sitting around.

Your commute is enough

Lessons are short and built to fit stolen moments — a bus ride, a lunch break, ten minutes before bed. The offline IDE keeps working even when the signal drops.

4.8 stars on the Play Store.

What's inside

Real offline IDE with autocompletion
AI Chat, AI Code Creation, in-lesson hints
Summary Tab to review without going backwards
Free certificate at the end — no paywall waiting for you

One thing worth knowing

There is no Pro version. No locked chapters. What you see is what you get.

Search Codino - Learn Python on the Google Play Store.

Codino — The Python Learning App That's 100% Free, Works Offline, and Actually Gives You a Certificate

Simanta Das — Sat, 13 Jun 2026 10:56:01 +0000

Codino — The Python Learning App That's 100% Free, Works Offline, and Actually Gives You a Certificate

I got tired of apps that lock everything good behind a paywall. So I built one that doesn't.

Codino is a Python learning app for Android, rated 4.8 stars on the Play Store, and everything in it is completely free. No locked chapters. No subscription to claim your certificate. No fake IDE that stops working the moment you lose signal.

What's inside

Bite-sized lessons with the same horizontal scrolling style that makes learning feel easy
Real offline IDE with autocompletion and syntax highlighting — works in dead zones, on buses, anywhere
AI Chat for when you want to ask something freely without digging through lessons
AI Code Creation so you can see how things actually work in practice
Summary Tab to review everything you've covered without hunting backwards
Free Certificate when you finish — no conditions, no upgrade prompt, just yours

Why I built it

Every app I tried either paywalled the good stuff or gave me a fake sandbox that didn't behave like real Python.

I wanted something that treated learning seriously without treating learners like a revenue opportunity. Codino is the result of that frustration.

It's free right now because I believe access to learning shouldn't cost anything. That's not a temporary promotion — that's the whole point.

What people are saying

"4.8 stars on the Play Store" — and every review goes straight back into making it better.

Try it

Search Codino - Learn Python on the Google Play Store, or tap the link below.

If you try it, I genuinely want to know what you think. Drop a review or reach out directly — every piece of feedback shapes what gets built next.

Why I Stopped Using Mimo and Built My Own Python App

Simanta Das — Sat, 13 Jun 2026 10:29:22 +0000

I Was a Mimo User. A Loyal One, Actually.

I liked the clean UI, the bite-sized lessons, and the streak system. It made learning feel like a game, and for a while, that was enough. But then I hit a wall—not a knowledge wall, a paywall.

I wanted to access the advanced projects. Locked. The certificate at the end? Locked. Half the course I thought I was getting? Locked behind a subscription that costs more than my monthly phone bill.

I closed the app and just sat there a little annoyed.

The Thing No One Talks About With These Apps

I started looking at alternatives: Sololearn, Programiz, and a few others. They all had the same pattern: hook you with a free tier, make you feel progress, then ask for money right when things get interesting.

And the offline situation is genuinely bad across all of them. If I’m on a bus or in a dead zone, I’m basically stuck. Most apps simulate coding in a fake little sandbox that doesn’t even behave like real Python. You finish a lesson thinking you learned something, and then you open a real editor and have no idea what you’re doing.

I realized I wasn’t actually learning to code. I was learning to complete lessons.

So, I Decided to Build the Thing I Actually Wanted

I’m a developer. That’s not me being arrogant; that’s just the obvious next step when you’re frustrated enough. I started building Codino.

The first thing I knew for certain: It had to be completely free. No “free tier.” No locked chapters. No certificate behind a $15/month subscription. Free means free.
The second thing: A real IDE. Not a simulated one. An actual offline code editor with autocompletion and proper syntax highlighting—the kind that works in a dead zone on a moving bus. Because that’s when I actually have time to code.

What It Turned Into

Honestly, it grew beyond what I originally planned.

The lessons follow the same horizontal scrolling format that made Mimo enjoyable to use, but without stopping every few screens to ask for money. There’s an AI feature built into lessons that gives hints when you’re stuck, and the daily quota is generous—unlike apps that give you three AI hints and then say, “upgrade for more.”

I also added:

AI Chat: For when you want to just ask a question freely.
AI Code Creation: For when you want to see how something works in practice.
Summary Tab: So you can review what you’ve covered without digging back through lessons.
Free Certificate: Yes, the certificate is completely free.

Where It Is Now

Codino is new. I’m not going to pretend otherwise. The community is small, the download count is humble, and there’s plenty still to build.

But the core of it works:

The offline IDE works.
The AI features work.
The lessons work.
And it costs nothing.

I built it because I was tired of apps that treat learners like a revenue opportunity first and a student second. Whether that resonates with other people or not, I’m genuinely proud of what it is right now.

If you’re learning Python and you’re tired of hitting paywalls, give it a try. It’s on the Play Store, it’s called Codino, sitting at 4.8 stars, and it’s completely free. At least for now, I have no plans to change that.

If you’ve used Codino or have thoughts, drop them in the comments. I read everything.